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Old 05-07-2011, 11:08   #1
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Galvanic Corrosion in the US Navy

It seems that the new USS Independence is "falling apart" from galvanic corrosion where the aluminum hull attaches to the stainless water jets. The Navy blames the builder (Austal and General Dynamics) for leaving out corrosion control systems to save money. Austal blames it on the US Navy's poor maintenance (I guess not changing the zincs )

This sound like your basic multihull saildrive warranty claim -- except for the missiles, guns, and helipad topsides.

Cool video:



Carl
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Old 05-07-2011, 11:21   #2
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Re: Galvanic Corrosion in the US Navy

I also noticed in the video that the Navy seems to be going with a Danforth (or Fortress?) anchor.

Maybe a rollbar anchor would get in the way of the forward gun (a BAE Mk 110 57 mm gun that fires 220 rounds a minute with a range of 9 miles )

Carl

PS - I wonder if the pirates off Somalia have seen that gun?
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Old 05-07-2011, 12:18   #3
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Re: Galvanic Corrosion in the US Navy

Nah, ordinary basic cheap mild steel is magnetic so you wouldn't want any old chinese made mild steel anchor on the latest sexy speed machine

Americans should buy american goods, including anchors
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Old 05-07-2011, 12:31   #4
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Re: Galvanic Corrosion in the US Navy

A GOOD AUSTRALIAN DESIGNED CAT And funny thing is the Australian navy and all the ferry company's around the world don't have the same prob and on the 2/7/11 the US have ordered another four of these cats costing around $300mil
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Old 05-07-2011, 13:00   #5
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Re: Galvanic Corrosion in the US Navy

Quote:
A GOOD AUSTRALIAN DESIGNED CAT
It's a Tri.
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Old 05-07-2011, 13:12   #6
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Re: Galvanic Corrosion in the US Navy

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Originally Posted by CarlF View Post
...It seems that the new USS Independence is "falling apart" from galvanic corrosion where the aluminum hull attaches to the stainless water jets.
So, is that why the bilge pumps are going a million miles an hour? Jezus H. Christopher, you could power a small cities water supply with amount of stuff they are pumping out.
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Old 05-07-2011, 14:48   #7
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Re: Galvanic Corrosion in the US Navy

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So, is that why the bilge pumps are going a million miles an hour? Jezus H. Christopher, you could power a small cities water supply with amount of stuff they are pumping out.
Actually, mate, one might guess that the discharge seen in the video is cooling water from engines or gen sets, not bilge pumps.

Sure is a cool looking ship, though!

Cheers,

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Old 05-07-2011, 15:59   #8
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Re: Galvanic Corrosion in the US Navy

U. S. Navy anchors are usually stockless and very heavy. They are designed that way so that they can be run over and broken free quickly.
kind regards,
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